See What Sinks and Floats

You’ll need a large container or bucket full of water. Go on a nature walk and collect items such as rocks, pumice, pine cones, feathers, leaves, seeds, nuts etc. As you collect things, discuss with the children whether they think they’ll float or sink and why. 

When you have finished collecting objects, get the children to predict which items will float and which ones will sink.  They can sort them into 2 piles.  The discussion around the decision is important, so let them debate with each other. After predictions have been made, check them! Put each object in the water to test the predictions.  Discuss any that they predicted incorrectly.  This can be a really great time to introduce the concept of density.  “Why did the big bit of pumice float, but the smaller rock sink? Because the smaller rock was denser than the pumice, which is full of air bubbles.”

Find some inspiration here:

Floating, sinking and density video for kids

Observation sheet

Kim Manunui

Hi, I’m Kim and I work with a great team to help individuals, as well as small and not so small businesses get their message, product and services to the world using digital media and creating wonderful websites that don’t cost the earth.

I was born in Canada, and grew up around Vancouver and the mountains of British Columbia. My love of pristine environments led me to New Zealand and eventually to the mountains, lakes and rivers of the central North Island which is home. My family’s heritage is here, and it’s from here that Korio traverses the planet.

The digital world is never static and neither are we.

And I say ‘we’ because I work with an awesome group of talented people who I gather together as required to complete a project.  Whatever your business, not-for-profit or individual needs are we gather the best team to get the job done.

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